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N-bromobutanimide → 8-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

HRID 1910922
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HRID 1910922 반응식
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]23[NH:20][CH2:19][CH2:18][N:9]2[C:10](=[O:17])[C:11]2[N:12]([CH:14]=[CH:15][CH:16]=2)[CH2:13]3)=[CH:4][CH:3]=1.[Br:21]N1C(=O)CCC1=O>C1COCC1>[Br:21][C:15]1[CH:16]=[C:11]2[C:10](=[O:17])[N:9]3[CH2:18][CH2:19][NH:20][C:8]3([C:5]3[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=3)[CH2:13][N:12]2[CH:14]=1.[Br:21][C:14]1[N:12]2[CH2:13][C:8]3([C:5]4[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=4)[NH:20][CH2:19][CH2:18][N:9]3[C:10](=[O:17])[C:11]2=[CH:16][CH:15]=1
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5

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HCID 67184N-bromobutanimideHCID 6736965310a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

생성물 2

HCID 584063618-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-oneHCID 584063827-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

시약·촉매·용매 1

HCID 8028
Tetrahydrofuran
용매

실험 절차

To a solution of 10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (100 mg, 0.35 mmol) dissolved in THF (20 mL) was added N-bromosuccinimide (62 mg, 0.35 mmol) and the reaction mixture was stirred at room temperature for 1 h. LCMS analysis showed a mixture of mono brominated product (366/368 m/z), a small amount of dibrominated pyrrole (446 m/z) and debrominated starting material (288 m/z). The reaction mixture was partitioned with water (25 ml) and CH2CL2 (25 mL) and the organic layer was separated and concentrated in vacuo to give crude product (light yellow oil). The crude mixture was then purified using flash chromatography (Biotage SP4, 12 g cartridge, 0-10% MeOH gradient in CH2Cl2) to give 7-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (A) and 8-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (B) in a 0.6:1 ratio (98.4 mg, yield 77%).

후처리

  1. additiona mixture
  2. customThe reaction mixture was partitioned with water (25 ml) and CH2CL2 (25 mL)
  3. customthe organic layer was separated
  4. concentrationconcentrated in vacuo
  5. customto give crude product (light yellow oil)
  6. customThe crude mixture was then purified

출처 및 근거

ORD 기록
ord-a99f9d63a650445abb40019d8ba95cef
출처 데이터셋
uspto-grants-2013_12
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08604034B2

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